39968215 has 8 divisors (see below), whose sum is σ = 54813600. Its totient is φ = 27406752.

The previous prime is 39968197. The next prime is 39968219. The reversal of 39968215 is 51286993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39968215 - 2⁹ = 39967703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39968219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570940 + ... + 571009.

It is an arithmetic number, because the mean of its divisors is an integer number (6851700).

Almost surely, 2^39968215 is an apocalyptic number.

39968215 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

39968215 is a deficient number, since it is larger than the sum of its proper divisors (14845385).

39968215 is a wasteful number, since it uses less digits than its factorization.

39968215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141961.

The product of its digits is 116640, while the sum is 43.

The square root of 39968215 is about 6322.0419960642. The cubic root of 39968215 is about 341.9045793550.

The spelling of 39968215 in words is "thirty-nine million, nine hundred sixty-eight thousand, two hundred fifteen".